Domestic Gas Safety ACS

Each general work category has a core element which must be taken before an operative can be assessed on individual work types.

For Example:

An operative only wishes to install domestic central heating for which the appropriate assessment category is CEN1. Before taking CEN1, he must first be assessed on core domestic gas safety (CCN1).

After completing core domestic gas safety he is eligible to be assessed on one or more domestic appliances, but cannot legally carry out work on any appliance type until he has the appropriate certificate of assessment.

If our operative chooses only to take the central heating appliance assessment he can only legally work on central heating appliances.

Having gained his domestic core gas safety he can then choose to changeover to another discipline eg Core Commercial following which he could extend his work capability to include commercial heating appliances. For more information on changeover courses, see the commercial sections or further development.

Most candidates opt to attend our optional revision sessions prior to taking any of the following assessments. Whilst all of the following assessments can be taken without revision, we find that in a rapidly changing industry revision classes are an essential pre-requisite for all but the most up-to-date informed engineer.

These assessments have been designed to test competence in Domestic Natural Gas Safety work by both written and practical assessments in accordance with the requirements of the Nationally Accredited Certification Scheme for Individual Gas Fitting Operatives.

Reference - Assessments Available

  • CCN 1 - Core Domestic Gas Safety Assessment
  • CKR 1 - Install, exchange, disconnect, service, repair, breakdown and commission
    domestic gas cooking appliances
  • HTR 1 - Install, exchange, disconnect, service, repair, breakdown and commission
    domestic open, balanced and fan assisted flued gas fires and wall heaters
  • WAT 1 - Install, exchange, disconnect, service, repair, breakdown and commission
    domestic gas instantaneous water heating appliances
  • LAU 1 - Install, exchange, disconnect, service, repair, breakdown and commission
    domestic gas laundry appliances
  • CEN 1 - Install, exchange, disconnect, service, repair, breakdown and commission
    domestic gas fired central heating/hot water boilers and circulators up to 70kw Nett
  • DAH 1 - Install, exchange, disconnect, service, repair, breakdown and commission
    domestic gas fired ducted air heaters of rated input not exceeding 70kw Nett
  • LEI 1 - Install, exchange, disconnect, service, repair, breakdown and commission
    domestic gas leisure and miscellaneous equipment/appliances
  • MET 1 - Install, exchange, remove and commission domestic gas meters
  • HWB 1 - Install, exchange, remove and commission gas fired hot water boilers
  • CKHB 1 - Install, exchange, remove and commission gas fired range cooker/boiler appliances
  • DFDA 1 - Install, exchange, disconnect, service, repair, breakdown, convert and commission
    appliances fitted with forced draught burners

CORE GAS SAFETY CCN1

Core Gas Safety comprises fifteen core competencies which are assessed by written and practical tests as indicated below.

Core Competencies Written Practical
Tests
Written
Practical

1 Gas Safety Legislation

 .
2 Gas Emergency Actions and Procedures .
3 Characteristics of Combustion

4 Ventilation
5 Installation of Pipework and Fittings
6 Test for Tightness
7 Checking and/or Setting Meter Regulators
8 Identification of Unsafe Situations and the Use of Emergency Notices and Warning Labels
9 The Operation of and Positioning of Emergency Isolation Controls and Valves .
10 Checking and Setting Appliance Burner Pressures and Gas Rates
11 The Operation and Checking of Appliance Gas Safety Devices and Controls
12 Flueing Standards .
13 Flue Testing
14 Installation of Open, Balanced and Fan Assisted Flue Assemblies
15 Are-establish Existing Gas Supply and Re-light Appliances

 

CORE GAS SAFETY CCN1- WRITTEN ASSESSMENTS

These consist of THREE Open and ONE Closed Book written assessments. The Open Book assessments permit the use of approved reference material such as CSkills manuals to obtain answers. The Closed Book contains questions on essential gas safety knowledge where reference material is not allowed. All four written assessments contain either MULTIPLE CHOICE questions or TRUE/FALSE statements.

 

CORE GAS SAFETY CCN1- PRACTICAL

ASSESSMENTS

Our courses cover all aspects of each assessment and are competitively priced.

The practical competencies are assessed in four sections: Domestic Installations, Ventilation, Gas Safety Controls and Flues - see table below.

INTRODUCTION

CORE COMPETENCIES ASSESSED - PRACTICAL TASKS UNDERTAKEN

Test for Tightness - with gas meter and appliances fitted- with no gas meter and no gas appliances fitted - identify, locate and repair gas escapes
 
Installation of pipework and fittings - identify the relevant standards in relation to pipework: passing through walls, supports and fixings, position in relation to other services, connection and disconnection, cross bonding- install copper and mild steel pipework (including longscrew) - use temporary continuity bond - purge an installation
 
Checking and/or setting meter regulators - check standing and working pressures at the meter, and explain the correct procedures to be taken if incorrect

Checking and setting appliance burner pressures and gas rates - check and set burner pressures and gas rates in accordance with appliance manufacturer’s instructions

Re-establish existing gas supply and re-light appliances - re-establish an existing gas supply by completing visual inspection of the system, purging, re-lighting appliances and checking for spillage at any open flued appliances

Characteristics of combustion - identify visual signs of complete and incomplete combustion due to faults from the lack of primary air, the condition of the burner and its components

Identification of unsafe situations - identify and classify unsafe situations as ‘At Risk’ or ‘Immediately Dangerous’ - explain gas emergency actions and procedures

Emergency notices and warning labels - select the appropriate warning labels or notices to a selection of unsafe situations

Ventilation - calculate ventilation requirements for specified situations and select appropriate air vents/bricks- identify adequate or inadequate pre-selected air vents/bricks for specified situations

The operation and checking of appliance gas safety devices and controls - identify and explain the operation of gas taps, regulators, relay valves, cooker lid safety shut off valves, vitiation sensing devices, bi-metal strips, thermo-electric valves, liquid expansion valves, thermostats (mechanical and electrical), solenoid valves and multi-functional controls- identify any controls not operating correctly.

 

DOMESTIC APPLIANCE ASSESSMENTS

The appliance assessments link the competencies gained during the Core Gas Safety assessment. The application of these competencies in conjunction with manufacturer’s instructions and other industry guidance will be required to complete the written and practical tests.

A typical assessment provision must enable a candidate to demonstrate knowledge and understanding and practical competence in:

• appliance installation and servicing

• checking operational safety components which are defective or require
- adjustment - cleaning - replacement - lubrication

• recognition of satisfactory/unsatisfactory operation of
- control taps - pressure switches
- lid safety cut off devices - fan thermostats
- gas valve assemblies - fan units
- thermostat(s) - gas light mantles
- flame supervision devices - burners
- limit thermostat(s) - heat exchangers

 

DOMESTIC GAS SAFETY ASSESSMENTS - CODES

AND DURATION

Open Book: Part I - Gas Safety Legislation
Written - 1hr

Open Book: Part 2 - Other Core Competencies
Written - 2hr 15min

Open Book: Part 3 - Other Core Competencies
Written - 2hr

Closed Book - Essential Knowledge
Written - 45min

Test 1 - Domestic Installations
Practical - 2hr 30min

Test 2 - Ventilation
Practical - 50min

Test 3 - Gas Safety Controls
Practical - 2hr 30min

Test 4 - Flues
Practical - 1hr 50min

Gas Cookers - CKR1
Written - 20min
Practical - 3hr 15min

Gas Fires and Wall Heaters - HTR1
Written - 25min
Practical - 4hr 30min

Instantaneous Wall Heaters - WAT1
Written - 20min
Practical - 3hr 45min

Central Heating Boilers - CEN1
Written - 25min
Practical - 4hr

Ducted Air Heaters - DAH1
Written - 20min
Practical - 4hr 15min

Laundry - LAU1
Written - 15min
Practical - 3hr 15min

Leisure/Miscellaneous - LEI1
Written - TBA
Practical - TBA

Gas Meters - MET1
Written - 30min
Practical - 1hr 30min

 

ON SUCCESSFUL COMPLETION OF CCN1 AND 

DOMESTIC APPLIANCES  Why stop there!

Consider increasing your skill competency level by taking Change Over assessment modules. This would allow a domestic operative to extend their work range into the commercial sector of the industry where they can choose to undertake a number of commercial assessments:

 

CODNCo1: CHANGEOVER CORE GAS SAFETY TO COMMERCIAL GAS SAFETY

CODC1:  CHANGEOVER CORE GAS SAFETY TO COMMERCIAL CATERING

COCATA1:  CHANGEOVER DOMESTIC COOKERS TO COMMERCIAL CATERING APPLIANCES

CONGLP1:  CHANGEOVER CORE GAS SAFETY (NATURAL GAS TO LPG GAS)